Carrying of constant bit rate services via a fine grain metro transport network channel

Abstract

In some implementations, a first network node may identify a periodic start time of pseudo-ethernet packets based on an available clock. The first network node may receive a client data stream having a constant data rate. The first network node may generate generic mapping procedure (GMP) overhead information based at least in part on the data rate. The first network node may transmit, to a second network node and using the periodic start time, the client data stream within pseudo-ethernet packets that include the GMP overhead information that indicates an amount of information that arrived at the first network node within a period associated with the periodic start time.

What is claimed is: 
     
         1 . A method performed by a first network node, the method comprising:
 identifying a periodic start time of pseudo-ethernet packets based on an available clock;   receiving a client data stream having a data rate;   generating generic mapping procedure (GMP) overhead information based at least in part on the data rate; and   transmitting, to a second network node and using the periodic start time, the client data stream within pseudo-ethernet packets that include the GMP overhead information that indicates an amount of information that arrived at the first network node within a period associated with the periodic start time.   
     
     
         2 . The method of  claim 1 , further comprising:
 identifying a client rate from the GMP overhead information.   
     
     
         3 . The method of  claim 1 , further comprising:
 transmitting a time stamp associated with the first network node.   
     
     
         4 . The method of  claim 1 , further comprising:
 inserting one or more bytes into the pseudo-ethernet packets to align timing with the periodic start time.   
     
     
         5 . The method of  claim 1 , wherein the available clock comprises one or more of:
 a clock derived from a global ToD reference,   a clock derived from a network clock, or   a clock derived from a recovered ingress client rate clock.   
     
     
         6 . The method of  claim 1 , further comprising:
 receiving a time-of-day (ToD) synchronization message associated with the available clock.   
     
     
         7 . The method of  claim 1 , wherein the pseudo-ethernet packets comprises fine grain metro transport network (fgMTN) packets. 
     
     
         8 . The method of  claim 1 , wherein client data stream is associated with a constant bit rate (CBR) service. 
     
     
         9 . The method of  claim 1 , further comprising:
 inserting the GMP overhead information to pseudo-ethernet packets before receiving a final data packet associated with the pseudo-ethernet packets.   
     
     
         10 . A system comprising:
 one or more memories of a first network node; and   one or more processors, of a first network node and coupled to the one or more memories, to:
 identify a periodic start time of pseudo-ethernet packets based on an available clock; 
 receive a client data stream having a data rate; 
 generate generic mapping procedure (GMP) overhead information based at least in part on the data rate; and 
 transmit, to a second network node and using the periodic start time, the client data stream within pseudo-ethernet packets that include the GMP overhead information. 
   
     
     
         11 . The system of  claim 10 , wherein the available clock comprises one or more of:
 a clock derived from a global ToD reference,   a clock derived from a network clock, or   a clock derived from a recovered ingress client rate clock.   
     
     
         12 . The system of  claim 10 , wherein one or more processors are to:
 receive a time-of-day (ToD) synchronization message associated with the available clock.   
     
     
         13 . The system of  claim 10 , wherein the pseudo-ethernet packets comprises fine grain metro transport network (fgMTN) packets. 
     
     
         14 . The system of  claim 10 , wherein client data stream is associated with a constant bit rate (CBR) service. 
     
     
         15 . The system of  claim 10 , wherein one or more processors are to:
 insert the GMP overhead information to pseudo-ethernet packets before receiving a final data packet associated with the pseudo-ethernet packets.   
     
     
         16 . A computer program product comprising:
 one or more computer readable storage media, and program instructions collectively stored on the one or more computer readable storage media, the program instructions comprising:
 program instructions to identify a periodic start time of pseudo-ethernet packets based on an available clock; 
 program instructions to receive a client data stream having a data rate; 
 program instructions to generate generic mapping procedure (GMP) overhead information based at least in part on the data rate; and 
 program instruction to transmit, to a second network node and using the periodic start time, the client data stream within pseudo-ethernet packets that include the GMP overhead information that indicates an amount of information that arrived at a first network node within a period associated with the periodic start time. 
   
     
     
         17 . The computer program product of  claim 16 , wherein the program instructions comprise:
 program instructions to identify a client rate from the GMP overhead information.   
     
     
         18 . The computer program product of  claim 16 , wherein the program instructions comprise:
 program instructions to transmit a time stamp associated with the first network node.   
     
     
         19 . The computer program product of  claim 16 , wherein the program instructions comprise:
 insert one or more bytes into the pseudo-ethernet packets to align timing with the periodic start time.   
     
     
         20 . The computer program product of  claim 16 , wherein the available clock comprises one or more of:
 a clock derived from a global ToD reference,   a clock derived from a network clock, or   a clock derived from a recovered ingress client rate clock.